Edward h



(No Model.) i

E. H. AMET..

PIRE ALARM AND TELEPHONE APPARATUS. No. 470,231. Patented Mar. 8, 1892.

Eff /f/ bodying my invention.

UNiTnn STATES a PATENT Ori-rient EDIVARD H. AIWIET, OF CHICAGO, ILLINOIS, ASSIGNOR TO HIMSELF AND HERBERT A. STREETER, OF SAME PLACE.

FIRE-ALARM AND TELEPHONE. APPARATUS.

SPECIFICATION forming part of Letters Patent No. 470,231, dated March 8, 1892.

Application filed July 26, 1890.

To all whom it may concern.-

Be itknovvn that I, EDWARD H AMET, acitizen of the United States, residing in Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Fire-Alarm and'lelephoneApparatus, of which the following is a specification.

My invention relates tov improvements in automatic fire-alarm and telephone systems.

The object of my invention is to provide an automatic lire-alarm apparatus which may be used in connection with the ordinary telephone system or circuits now commonly in use Without interfering in any Way with the ordinary use of the telephone and which will serve to send an automatic fire alarm signal to the central telephone-office in case of fire in any building supplied With a telephone and Without any eXtra expense for line or circuit wires.

My invention consistsin the combination, with a telephone and telephone-circuit of the usual or ordinary construction, of an automatic ire-alarm-signaling device, a thermostat and thermostat-circuit, including a magnet, an induction-coil circuit having a secondary circuit adapted to be included in the telephone-circuit, the magnet in the thermostat-circuit operating to cut out the telephone and throw the secondary circuit into connection With the telephone-line, so that the signaling device may in case of fire serve to automatically send al signal to the central office.

The invention further consists in the novel devices and novel combinations of parts and devices herein shown and described, and more particularly pointed out in the claims.

In the accompanying drawings, which form a part of this specification, and in which similar letters of reference indicate like parts, Figure 1 is a diagram view of a device em- Fig. 2 is an elevation of the pole-changer in the primary circuit, and Fig. 3 is a section of the same.

In the accompanying drawings, A represents an ordinary telephone apparatus, B the bell or signaling device at the central office, and C the telephone line or circuit.

E E represent thermostats in the building Where the telephone is located and F the thermostat-circuit, in which is included a magnet F and a battery F2.

Serial No. 360,024. (No model.)

The magnet F in the thermostat-circuit F has a movable armature f, which releases the lever G, carrying the movable contact c, by which the telephonecircuit O is held normally closed at c'.

D is an automatic signaling device having H represents the primary circuit of the induction-coil K. The primary circuit H is connected With the thermostat-circuit F and battery F2 by the movement of the lever G, Which makes connection at h h. t Includedv in the circuit H is a pole-changer N, having the insulated segmental disks n n and brushes n2 n3 n4 'm5, so that the current through the primary coil I-I and circuit H will be an alternating one.

The induction-coil K is included in a circuit K, in which is included the signal-Wheel d of the signaling device, and which is connected by the lever G and contact-piece 7c with the telephone-circuit C.

The operation is as follows: Normally the telephone-circuit C is closed at c c and the thermostat-circuit Fis open or broken at E E and the primary circuit H opened at h h', so that the fire-alarm-signaling part of the apparatus has no electrical connection normally with the telephone or telephone-circuit. The telephone may thus be used for ordinary purposes, the same as though no fire-alarm apparatus were combined with it. In case of iire in the building the thermostat-circuit Will be closed at E by the heat caused by the fire, thus energizing the magnet F', included in the thermostat-circuit, and lifting the armature f, and thus releasing the pivoted lever G and thereby closing the primary circuit H of the signaling apparatus at h h and the secondary circuit at 7c, and at the same time releasing the clock-Work mechanism of the signaling device at g g. The signal-Wheel d IOO the telephone and throw the secondary cir` cuit into connection With the telephone-line, so that the signaling device may send a signal to the signal-receiving instrument at the central oiiice in case of fire, substantially as Specified.

2. The combination, with the telephone and telephonc-circuit and a signal-receiving instru ment at the central o'l'lice, of a thermostat and thermostat-circuit, including a magnet, an induction-coil or primary circuit adapted to he included in the thermostat-circuit, and

a secondary circuit adapted to be included in the telephone-circuit, the magnet in the thermostat-circuit operating to cut out the tele phone and throw the secondary circuit into connection with the telephone-line and to include said primary or induction-coil circuit in the thermostat-circuit, substantially as set forth.

3. The combination, with the telephone and telephone-circuit and a signal-receiving instrument at the central office, of a thermostat and thermostat-circuit, including a magnet, an induction-coil or primary circuit adapted to be included in the thermostat-circuit, a secondary circuit adapted to be included in the telephone-circuit, the magnet in the thermostat-circuit operating to cut out the telephone and throw the secondary circuit into connection with the telephone-line and to include said primary or inductioncoil circuit in the thermostat-circuit, and a pole-changer in said primary circuit, substantially as specified.

EDVARD Il. AME'F.

Witnesses:

1I. M. BfIUNDAY, JOHN W. lllmvnnjv. 

